Well that would explain why it failed on 1.6.2 version as well (in the same way) although I didn't expect that version to load fully I was hoping to just get a bunch of other errors in that test. This is what I get starting #886.
Launching game
Looking for old natives to clean up...
Unpacking natives to C:\Users\Robert\AppData\Roaming\.minecraft\versions\1.6.4-Forge9.11.0.891\1.6.4-Forge9.11.0.891-natives-460208861642497
Launching in C:\Users\Robert\AppData\Roaming\.minecraft
Running C:\Program Files\Java\jre7\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Djava.library.path=C:\Users\Robert\AppData\Roaming\.minecraft\versions\1.6.4-Forge9.11.0.891\1.6.4-Forge9.11.0.891-natives-460208861642497 -cp C:\Users\Robert\AppData\Roaming\.minecraft\libraries\net\minecraftforge\minecraftforge\9.11.0.891\minecraftforge-9.11.0.891.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.7\launchwrapper-1.7.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\Robert\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\Robert\AppData\Roaming\.minecraft\versions\1.6.4-Forge9.11.0.891\1.6.4-Forge9.11.0.891.jar net.minecraft.launchwrapper.Launch --username shinji257 --session token:f57a04810e594743924a1d8381320bba:24526dfbf2d84a3da10c5437d667bfa1 --version 1.6.4-Forge9.11.0.891 --gameDir C:\Users\Robert\AppData\Roaming\.minecraft --assetsDir C:\Users\Robert\AppData\Roaming\.minecraft\assets --tweakClass cpw.mods.fml.common.launcher.FMLTweaker
Client> Sep 25, 2013 12:04:43 PM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Client> Sep 25, 2013 12:04:43 PM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Client> Sep 25, 2013 12:04:43 PM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
Client> 2013-09-25 12:04:43 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.4.9.891 for Minecraft 1.6.4 loading
Client> 2013-09-25 12:04:43 [iNFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_40, running on Windows 8:amd64:6.2, installed at C:\Program Files\Java\jre7
Client> 2013-09-25 12:04:43 [iNFO] [ForgeModLoader] Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.6.4_HD_U_C4.jar
Client> 2013-09-25 12:04:43 [iNFO] [sTDOUT] Loaded 40 rules from AccessTransformer config file fml_at.cfg
Client> 2013-09-25 12:04:43 [iNFO] [sTDOUT] Loaded 109 rules from AccessTransformer config file forge_at.cfg
Client> 2013-09-25 12:04:44 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
Client> 2013-09-25 12:04:44 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
Client> 2013-09-25 12:04:44 [iNFO] [ForgeModLoader] Loading tweak class name optifine.OptiFineForgeTweaker
Client> 2013-09-25 12:04:44 [iNFO] [ForgeModLoader] Calling tweak class optifine.OptiFineForgeTweaker
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFineForgeTweaker: acceptOptions
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFineForgeTweaker: injectIntoClassLoader
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFine ClassTransformer
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFine URL: file:/C:/Users/Robert/AppData/Roaming/.minecraft/mods/OptiFine_1.6.4_HD_U_C4.jar
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFine ZIP file: java.util.zip.ZipFile@ba26520
Client> 2013-09-25 12:04:44 [iNFO] [sTDOUT] OptiFineForgeTweaker: getLaunchArguments
Client> 2013-09-25 12:04:44 [iNFO] [ForgeModLoader] Launching wrapped minecraft {net.minecraft.client.main.Main}
Client> 2013-09-25 12:04:45 [sEVERE] [ForgeModLoader] Unable to launch
Client> java.lang.reflect.InvocationTargetException
Client> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Client> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
Client> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
Client> at java.lang.reflect.Method.invoke(Unknown Source)
Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityClientPlayerMP
Client> at net.minecraft.client.main.Main.main(SourceFile:37)
Client> ... 6 more
Client> Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityClientPlayerMP
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> ... 7 more
Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityPlayerSP
Client> at java.lang.ClassLoader.defineClass1(Native Method)
Client> at java.lang.ClassLoader.defineClass(Unknown Source)
Client> at java.security.SecureClassLoader.defineClass(Unknown Source)
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:171)
Client> ... 9 more
Client> Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityPlayerSP
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> ... 13 more
Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/AbstractClientPlayer
Client> at java.lang.ClassLoader.defineClass1(Native Method)
Client> at java.lang.ClassLoader.defineClass(Unknown Source)
Client> at java.security.SecureClassLoader.defineClass(Unknown Source)
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:171)
Client> ... 15 more
Client> Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.AbstractClientPlayer
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> at java.lang.ClassLoader.loadClass(Unknown Source)
Client> ... 19 more
Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/entity/AbstractClientPlayer (wrong name: beu)
Client> at java.lang.ClassLoader.defineClass1(Native Method)
Client> at java.lang.ClassLoader.defineClass(Unknown Source)
Client> at java.security.SecureClassLoader.defineClass(Unknown Source)
Client> at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:171)
Client> ... 21 more
Game ended with no troubles detected (exit code 0)